The Accessibility Score is an indicator of a websites accessibility “health”. Our score is calculated using an algorithm that factors in both the volume of issues on your site as well as the impact of those accessibility issues on end users.
For example, if an error on your website has little end-user impact, it will not weigh as heavily in your overall score compared to a WCAG error that has significant end-user impact. This is also why a website with a handful of impactful errors may have a lower score than a website with more errors that are less impactful to the end user.
If you have a low Accessibility Score it's an indication that there are significant accessibility issues that will impede users from being able to successfully interact with your site, and that these errors should be addressed.
It's important to note: your Website Accessibility Score is not the number of errors still remaining on your site or an indication of compliance.